/Engine/Plugins/Interchange/Runtime/Source/Nodes/Public/InterchangeVariantSetNode.h
This function allow to retrieve one VariantSet's unique id for this object.
[UFUNCTION](Programming/UnrealArchitecture/Reference/Functions)(BlueprintCallable, Category="Interchange | Node | SceneVariantSet") void GetCustomVariantSetUid ( const int32 Index, [FString](API\Runtime\Core\Containers\FString) & OutVariantUid ) const